Paper-cutting machine



(N0 Model.) 2 Sheets-Sheet 1.

W. G. FINLAY.

PAPER CUTTING MACHINE.

No. 326,859. Patented Sept. 22, 1885.

l Mae N. Pneus. nawumnwpner. vla-nimm u. c.

(No Model.) Y 2 Sheets-Sheet 2.

W. 8. HNLAY.

PAPER CUTTING MACHINE. No. 828,859. Patented Sept. 22, 1885.

Unire STATES PATENT Trice,

PAPER-CUTTING MACHINE.

SFECIFICATON forming part of Letters Patent No.326,859, dated September22` 1885.

Application tiled November 14,1884. (No model.)

To all whom t may concern:

Be it known that I, WILLIAM G. FINLAY, of Lawrence, in the county ofEssex and State of Massachusetts, have invented certain improvements inPaper-Cutting Machines, of which the following is a specification.

This invention relates to machinery for cutting a web of paper intosheets; and it has for its object to provide mechanism for rotating theroll that feeds the web of paper forward and the revolving knif'e thatcuts the paper into sheets.

The invention consists in the combination, with the feed-roll andrevolving knife, of a shaft geared directly to the arbor of thefeedroll, and another shaft geared directly to the arbor of therevolving knife, expanding pulleys on said shafts, and a belt connectingsaid pulleys, the shaft geared to the feed-roll being driven by a primemotor and imparting motion to the other shaft, which in turn revolvesthe knife, the relative speed of the knife and feed-roll being governedby the eX- panding pulleys, all of which I will now proceed to describe.

Of the accompanying drawings, forming a part of this specification,Figure l represents a side elevation of a paper-cutting machine providedwith my improvements. Fig. 2 represents a front elevation of the same.

The same letters of reference indicate the same parts in all the gures.

In the drawings, f represents the supporting-frame of the machine,having bearings for one or more niandrels, on which are wound Webs ofpaper to be cut.

g represents the feed-roll journaled in the frame f, and having on itsarbor a large gear, r.

c represents a shaft provided with an eX- panding pulley, P, and with apinion, s, which meshes with the gear r. The shaft c has a pulley at oneend, on which runs a driving-belt, j, which rotates the shaft c and rollg at a uniform rate. From the roll g the paper passes between the fixedknife It and the revolving knife Z, whereby the web of the paper issevered into sheets, said knives being of the usual construction. Therevolving knife is secured to two heads, m m, afiixed to an arbor, a,having at one end a gear-Wheel, o, meshing with a pinion, p, on a secondshaft, o', having another expanding pulley, P, which is connected by abelt, q, with the pulley on the shaft c. At each revolution of the knifeZa sheet is cut corresponding in length to the rapidity of rotation ofsaid knife, the paper always passing to the knife at a uniform rate ofspeed under all circumstances.

The expanding-pulleys P P are each preferably composed of two sections,a a, each of which is frusto-conical in shape and is slottedlongitudinally, the tapering peripheries of the sections being thusconverted into fingers separated by open spaces. The fingers are rigidlyconnected to the base or larger end of each section, which is providedwith a central tapped boss or nut, b, the nut of the one section havingleft-hand threads, while the nut of theothersectionhasright-handthreads. Theshaft c, upon which the pulley issupported, passes through said nuts, and is provided with right and lefthand screw-threads corresponding with those of the nuts, so that whenthe shaft is rotated and the sections of the pulley are prevented fromrotating the two sections will be moved simultaneously in oppositedirections by the right and left screw-threads. The sections a a areplaced on the threaded shaft with the fingers of the one sectionentering the slots of the other, thus forming a doublecone pulley havingits smallest diameter midway between its ends, where the peripheries ofthe two parts intersect. The larger ends or bases of the sections areprovided with slots s, Fig. l, which coincide with the slots in theperipheries of the sections, the slots s of each section end or basereceiving the iingers of the other section when the two sections aretelescoped, as hereinafter described. It will be seen that when thesections c ct are moved inwardly on the shaft or toward each other thediameter at the intersecting point will be increased, and when thesections are moved outwardly on the shaft said diameters will bedecreased, so that the diameter of the belt-supporting surface of thepulley will be varied in proportion to the movement of the sections,which may be telescoped or moved inwardly until their larger ends almostmeet, the ngers of each section projecting through the slotted bases ofthe other section, as shown at the lower portion of Fig. 2, thuspresent- IOO ing the largest possible central diameter, or may beseparated,las shown at the upper portion of Fig. 2, until the smallerends are almost separated and the smallest possible een tral diameter ispresented. The shaft c is provided with jam-nuts d d, to hold thesections at any points to which they may be adjusted on the shaft.

When desirable to alter the length of a sheet of paper, the speed of therevolving knife'is varied as follows: 1f a longer sheet is to be cut,the sections of the pulley P that are situated on the shaft c are movedtoward and into each other until the belt-supporting diameter isenlarged sufficiently, and at the same time the sections of the pulleyon the other` shalt, c, are moved from each other in the same ratio.This operation causes the cutting-knife to rotate slowly, and causes alonger sheet of paper to be cut off. The operation is reversed when ashorter sheet of paper is required, lh us causing the cutting-knife torotate at an increased velocity and form shorter sheets.

I do not limit myself to the use of pulleys of the describedconstruction, but may use any form of expanding-pulley that can be.mounted and adjusted on the shafts c c.

It will be seen that by the employment of the two shafts c c' geareddirectly to the feedroll and knifearbors,land provided with eX-panding-pulleys, enables motion to be communicated from the feed-roll tothe knife through one belt only, thus reducing the liability ofaccidental variation between movement of the feed-roll and knife causedby slipping of belts to the minimum, and making the mechanism simple andcompact.

I claim- In a paper-cutting machine, the feed-roll and revolving knifehaving gears affixed to their arbors, combined with the shafts c c',geared, respectively, to the feed-roll and to the rotary knife andprovided with expandingpulleys connected by a belt, as set forth. Intestimony whereoflhave signed my name to this specification, in thepresence of two subscribing Witnesses, this 11th day of November, 1884:.

WILLIAM G. 'EINLAY.

Witnesses:

GEORGE E. MILLER, ZACIIARY T. MERRILL.

